JP4894809B2 - Power supply system and portable device - Google Patents

Description

  The present invention relates to a power supply system having power generation means for generating drive power for a portable device and a fuel supply method to the power generation means.

  Conventionally, various chemical batteries are used in every field for consumer use and industrial use. For example, primary batteries such as alkaline dry batteries and manganese dry batteries, secondary batteries such as nickel / cadmium storage batteries, nickel / hydrogen storage batteries, lithium ion batteries, and the like. On the other hand, in recent years, the practical use of a power supply system using a fuel cell that has little influence (burden) on the environment and can realize extremely high energy utilization efficiency of about 30 to 40%, for example. Research and development are being actively conducted.

  In a power supply system using a fuel cell, for example, power generation fuel such as methanol is vaporized by a vaporizer, and the vaporized power generation fuel is reformed to hydrogen gas or the like by a reformer. Hydrogen gas after removing carbon monoxide in the hydrogen gas by a CO remover is supplied to the fuel cell to generate electricity. The fuel for power generation is supplied from the fuel tank to the chemical reaction unit having a vaporizer, a reformer, a CO remover, and the like. Here, in order to stably generate power in the fuel cell, the fuel for power generation must be supplied from the fuel tank without delay, and the configuration for satisfactorily supplying the fuel for power generation from the fuel tank Various are considered.

  As a mechanism for stably supplying power generation fuel from the fuel tank, for example, a configuration for supplying power generation fuel regardless of the remaining amount of power generation fuel by a liquid fuel penetrating material provided in the fuel tank, A configuration in which the fuel container is provided with a pressure adjusting mechanism, the pressure in the fuel container is kept constant, and the supply is stabilized (for example, see Patent Document 1) is considered.

JP 2001-93551 A

  By the way, in recent years, a power system using a fuel cell has been downsized so that it can be applied as a power unit replacing a secondary battery of a portable device such as a portable information terminal or a notebook computer, and the usable time is increased. Research and development are ongoing. When a power supply system using a fuel cell is mounted on such a portable device, the direction of the device is not constant during use and may be frequently directed in various directions. For example, the portable device may be turned upside down.

  However, for example, the configuration of the conventional fuel container described in Patent Document 1 is considered on the premise of a power supply system attached to a large apparatus. For this reason, when the supply of power generation fuel to the fuel tank is stabilized, a certain amount of inclination can be accommodated, but there is a limit.

  An object of the present invention is to stably supply power generation fuel to a power generation means in a small power supply system used for a portable device.

In order to solve the above-described problem, the invention according to claim 1 is a power supply system including a power generation unit that generates power using power generation fuel.
A main tank for storing the fuel for power generation;
A reserve tank for supplying the power generation fuel from the main tank, storing the supplied power generation fuel, and supplying the power generation means to the power generation means;
First conveying means for conveying the fuel for power generation in the main tank to the spare tank;
Spare tank remaining amount detecting means for detecting the remaining amount of power generation fuel in the spare tank;
Control means for controlling the first transport means so as to store a predetermined amount of the fuel for power generation in the spare tank according to the detection result of the spare tank remaining amount detection means,
The spare tank includes at least holding means for holding the power generating fuel supplied from the main tank in the vicinity of a fuel outlet.

The invention according to claim 12 includes a power supply system having a power generation means for generating power using power generation fuel, and is a portable device driven by the power generated by the power generation means.
The power supply system includes:
A main tank for storing the fuel for power generation;
A reserve tank for supplying the power generation fuel from the main tank, storing the supplied power generation fuel and supplying the power generation means to the power generation means;
First conveying means for conveying the fuel for power generation in the main tank to the spare tank;
Spare tank remaining amount detecting means for detecting the remaining amount of power generation fuel in the spare tank;
Control means for controlling the first transport means so as to store a predetermined amount of the fuel for power generation in the spare tank according to the detection result of the spare tank remaining amount detection means,
The spare tank includes at least holding means for holding the power generating fuel supplied from the main tank in the vicinity of a fuel outlet.

The invention according to claim 2 is the power supply system according to claim 1,
The control means controls the first transport means so that the spare tank is almost full.

The invention described in claim 10 is the portable device described in claim 9,
The control means controls the first transport means so that the spare tank is almost full.

The invention according to claim 3 is the power supply system according to claim 1 or 2,
The power supply system includes second transfer means for transferring the power generation fuel in the reserve tank to the power generation means,
The control means controls the second conveying means in accordance with a required amount of the power generation fuel required for power generation by the power generation means.

The invention according to claim 11 is the portable device according to claim 9 or 10,
The power supply system includes second transfer means for transferring the power generation fuel in the reserve tank to the power generation means,
The control means controls the second conveying means in accordance with a required amount of the power generation fuel required for power generation by the power generation means.

The invention according to claim 4 is the power supply system according to claim 3,
In the power supply system, at least one of the first transport unit and the second transport unit includes a pump whose transport amount is controlled by a predetermined drive signal.

The invention according to claim 5 is the power supply system according to claim 3 or 4,
The power supply system predicts a remaining amount of power generation fuel in the reserve tank by performing a predetermined prediction calculation process using at least a control amount of the second transport unit and a predetermined calculation coefficient by the control unit. When,
A power decrease detection means for detecting a decrease in power generated by the power generation means;
A correction means for correcting the value of the calculation coefficient when the power drop detection means detects a drop in generated power when the prediction means predicts that there is a remaining amount in the reserve tank;
It is characterized by providing.

The invention according to claim 6 is the power supply system according to any one of claims 1 to 4,
The control means further includes an inclination angle detecting means for detecting an inclination angle of the main tank and the reserve tank,
The first conveying means and / or the second conveying means are controlled in consideration of the inclination angle detected by the inclination angle detecting means.

The invention according to claim 12 is the portable device according to any one of claims 9 to 11,
The control means further includes an inclination angle detecting means for detecting an inclination angle of the main tank and the reserve tank,
The first conveying means and / or the second conveying means are controlled in consideration of the inclination angle information detected by the inclination angle detecting means.

The invention according to claim 7 is the power supply system according to any one of claims 1 to 6,
The remaining amount detecting means detects whether or not the remaining amount of the fuel for power generation in the reserve tank is greater than or equal to a reference amount;
The control unit controls the first transport unit so that the remaining amount in the reserve tank is equal to or greater than the reference amount when the remaining amount is detected to be less than a reference amount by the remaining amount detection unit. It is characterized by that.

The invention according to claim 13 is the portable device according to any one of claims 9 to 12,
The reserve tank remaining amount detecting means detects whether or not the remaining amount of the power generating fuel in the reserve tank is a reference amount or more,
The control means controls the first conveying means so that the remaining amount in the spare tank is equal to or greater than the reference amount when the remaining amount is detected to be less than the reference amount by the spare tank remaining amount detecting means. It is characterized by controlling.

The invention according to claim 8 is the power supply system according to any one of claims 1 to 7,
The power system includes a main tank remaining amount detecting means for detecting a remaining amount of power generation fuel in the main tank,
The control means controls the first transport means based on a detection result of the main tank remaining amount detection means.

The invention according to claim 14 is the portable device according to any one of claims 9 to 13,
The power system includes a main tank remaining amount detecting means for detecting a remaining amount of power generation fuel in the main tank,
The control means controls the first transport means based on a detection result of the main tank remaining amount detection means.

  ADVANTAGE OF THE INVENTION According to this invention, in a power supply system provided with the electric power generation means to generate electric power using the fuel for electric power generation, and portable equipment provided with this power supply system, the fuel for electric power generation can be stably supplied to an electric power generation means.

  Hereinafter, first and second embodiments of the present invention will be described in order with reference to the accompanying drawings.

(First embodiment)
The first embodiment will be described with reference to FIGS. First, the features of the apparatus according to the present embodiment will be described with reference to FIGS. FIG. 1 is a diagram illustrating an example of an internal configuration of a mobile device 10 according to the present embodiment. FIG. 2 is a diagram showing an internal configuration of the fuel cell system 20A mounted on the portable device 10 of the present embodiment. FIG. 3 is an external view of the mobile device 10, (a) is a front view of the mobile device 10, (b) is a top view of the mobile device 10, and (c) is a right side view of the mobile device 10. It is.

  The fuel cell system 20A of the present embodiment is provided in the mobile device 10. The portable device 10 is, for example, a PDA (Personal Digital Assistants) of a portable information terminal, and includes a CPU (Central Processing Unit) 11 that centrally controls each unit, and a ROM (Read Only Memory) 12 that stores information in a readable manner. A RAM (Random Access Memory) 13 for temporarily storing information, a non-volatile FROM (Flash Read Only Memory) 14 for storing information in a readable / writable manner, and an LCD (Liquid Crystal Display) 15 for displaying display information on the screen An LCD driver 16 that performs screen display control of the LCD 15 by a display control signal output from the CPU 11, a touch panel 17 that transmits input information input by a user's touch operation on the LCD 15 to the CPU 11, infrared communication, and connector communication. And a communication I / F (interface) for controlling communication with an external device using a wireless LAN communication system, etc. ) 18 and a fuel cell system 20A that generates power using a fuel cell as a power source of the portable device 10, and each part except for the LCD 15 is connected by a bus 19.

  The CPU 11 reads out a specified application program from the system programs and various application programs stored in the ROM 12 or FROM 14 and expands them in the RAM 13. The CPU 11 temporarily stores various instructions input from the touch panel 17 or various data corresponding thereto in the RAM 13 and executes various processes according to the developed application program using the input instructions and input data. . The CPU 11 stores the processing result in the RAM 13 and displays it on the LCD 15 as appropriate.

  Further, the CPU 11 transmits an instruction signal for instructing the power generation operation of the fuel cell system 20A and a load drive state signal indicating the content of the drive state of the portable device 10 to the fuel cell system 20A. Further, the CPU 11 receives a signal indicating the contents of the power generation state of the fuel cell system 20A from the fuel cell system 20A.

  The ROM 12 stores a startup supply program, an operation supply program, and a fuel shortage control program, which will be described later. Further, in the FROM 14, data such as a main tank remaining amount T1R, a spare tank remaining amount T2R, and a coefficient K2, which will be described later, are stored in an updatable manner. Further, a part or all of the programs and data stored in the FROM 14 may be received and stored from an external device via the communication network and the communication I / F 18. The LCD 15 performs screen display by a liquid crystal display method, but is not limited thereto, and may be replaced with an EL (Electro Luminescent) display or the like. Note that these configurations are merely representative examples of configurations in portable devices, and it goes without saying that other configurations may be used.

  The mobile device 10 is not limited to a PDA, and may be another device such as a notebook computer, a digital still camera, a digital video camera, a mobile phone, a PHS (Personal Handyphone System), a mobile TV, or a mobile game machine. .

  Next, the internal configuration of the fuel cell system 20A will be described with reference to FIG. The fuel cell system 20A includes a polymer electrolyte fuel cell 41 that employs a fuel reforming method.

  As shown in the figure, the fuel cell system 20A is roughly divided into a fuel for power generation, a detachable fuel cartridge 21 and a fuel cartridge 21 attached to the fuel cell system 21 to generate power supplied from the fuel cartridge 21. And a power generation module 30 </ b> A that generates (generates) predetermined power (electric energy) based on the fuel for use. Each configuration will be specifically described below.

[Fuel cartridge]
The fuel cartridge 21 includes a main tank 22 as a highly sealed fuel tank filled with and sealed with a power generation fuel composed of a liquid fuel or a liquefied fuel containing hydrogen in its composition, and the power generation fuel in the main tank 22. And a remaining amount sensor (main tank remaining amount detecting means) 23 for detecting the remaining amount.

The amount of fuel for power generation in the main tank 22 required for the fuel cell 41 to generate electric power of a predetermined voltage is controlled by the power generation control unit 31A of the power generation module 30A. ) 32, a preliminary tank 33, and a second pump (second transport means) 34 in this order, and are supplied to the vaporizer 36 of the chemical reaction unit 35 as needed.
Here, the structure, size, etc. of the first pump and the second pump are not particularly limited as long as the transport amount is controlled by a predetermined driving signal. As the pump structure, for example, a diaphragm A pump can be applied. Further, such a pump may be formed by, for example, microfabrication on a silicon substrate to reduce the size of the pump.

  Further, the fuel for power generation used in the fuel cell system 20A is a mixture of methanol and water, but is not limited to this, and an alcohol-based liquid fuel such as ethanol or butanol is applied instead of methanol. can do.

  The main tank 22 is provided with a control valve so that the fuel for power generation sealed in the main tank 22 can be supplied only when coupled to the power generation module 30A. Thereby, in a state where the fuel cartridge 21 is separated from the power generation module 30 </ b> A, the power generation fuel in the main tank 22 does not leak out of the fuel cartridge 21.

  Further, the remaining amount sensor 23 in the fuel cartridge 21 is configured to have a conductor set composed of a substantially rod-shaped conductor disposed at a predetermined position in the main tank 22, for example, and an electric resistance between the conductors. By measuring the value, the remaining amount of power generation fuel sealed in the fuel cartridge 21 is detected. The conductor is formed of a good conductor such as carbon, for example, but may be formed on the inner peripheral surface of the main tank 22 by a printing pattern formed of gold or the like.

  The remaining amount sensor 23 has a built-in resistance measurement circuit that measures the electrical resistance value between the conductors, and the measured electrical resistance value is output to the power generation control unit 31A, and the fuel for power generation is calculated from the electrical resistance value. The remaining amount is calculated. The remaining amount sensor 23 is not limited to such a resistance wire method, and other sensors such as an optical sensor method, a fiber sensor method using an optical fiber, and an ultrasonic method for measuring a change in ultrasonic reflection time may be used. It may be used. The fuel cartridge 21 is not limited to a detachable type, and may be configured to be integrated with the power generation module 30A.

[Power generation module]
Next, the power generation module 30A will be described. As shown in FIG. 2, the power generation module 30A of the present embodiment communicates with the CPU 11 via the bus 19, controls each part of the power generation module 30A according to the received instruction signal, and sends signals related to the power generation module 30A to the CPU 11 The power generation control unit 31A for transmitting to the power generation unit, the first pump 32 for conveying or blocking the power generation fuel supplied from the fuel cartridge 21 in accordance with the control signal of the power generation control unit 31A, and the impregnating material inside, A reserve tank 33 as a highly sealed fuel tank filled and sealed, and a second pump 34 for conveying or shutting off fuel for power generation supplied from the reserve tank 33 according to a control signal of the power generation control unit 31A Prepare.

  The impregnating material is, for example, urethane foam. The impregnating material may be at least disposed around the connection portion with the second pump 34 in the spare tank 33, but it is more preferable that the impregnating material is disposed so as to fill the entire spare tank 33. is there. For this reason, the impregnating material is stably transported from the power generating fuel contained in the impregnating material when the portable device 10 is tilted when the power generating fuel in the reserve tank 33 is transported to the second pump 34. .

  The power generation module 30 </ b> A also includes a carburetor 36 that vaporizes the fuel for power generation sent from the second pump 34, and reforming that reforms the fuel for power generation vaporized by the vaporizer 36 into fuel for the fuel cell 41. , A CO remover (carbon monoxide remover) 38 for removing CO (carbon monoxide) in the fuel generated by reforming by the reformer 37, a vaporizer 36, a reformer 37, and CO removal Driven by a heater 39 such as a thin film heater that heats the vessel 38 and a load connected to the fuel cell system 20A (meaning the portable device 10 that operates with the power supply of the fuel cell system 20A, and so on) And a fuel cell 41 that generates and outputs electrical energy as a power source (voltage / current).

  In particular, the chemical reaction section 35 is a portion composed of the vaporizer 36, the reformer 37, the CO remover 38, and the heater 39. The power generation module 30A includes a driver 40 that outputs drive power to the heater 39 based on a control signal from the power generation control unit 31A using the supply power output from the fuel cell system 20A.

  The power generation module 30A includes a power holding unit 42 including an electric double layer capacitor that temporarily holds the power generated in the fuel cell 41, and charging of the power holding unit 42 based on a control signal from the power generation control unit 31A. The control circuit 43 that controls the power supply to the load, and the power output from the fuel cell 41 and the power holding unit 42 based on the control signal from the power generation control unit 31A are converted into direct current and supplied to the load. A DC / DC converter 44 that outputs a signal indicating the supplied power (power signal of the power output from the fuel cell 41 and the power holding unit 42) to the power generation control unit 31A.

  In addition, the power generation module 30A includes an inclination sensor 45 that detects the direction and the degree of inclination of the portable device 10 (the fuel cartridge 21 and the reserve tank 33). The tilt sensor 45 includes, for example, a ball inside, a method of detecting the tilt information by detecting the movement of the ball in contact with an electrode or optically, or a magnet inside, and the movement of the magnet. There are a method of detecting tilt information by detecting a change in magnetic force, and a method of detecting tilt information by a change in electric capacity corresponding to a change in the liquid level provided with liquid inside.

  Further, although not shown, the fuel cell system 20A is connected to a household AC power source and is configured to be connectable with an AC adapter that converts an AC current into a predetermined DC current. When the AC adapter is connected, the control circuit 43 supplies the DC current output from the AC adapter to the power holding unit 42 and the DC / DC converter 44 instead of the fuel cell 41, and the power supply power of the load And

[Vaporizer, reformer, CO remover and fuel cell]
In the case where methanol (CH ₃ OH) and water (H ₂ O) are used as power generation fuel and hydrogen gas (H ₂ ) for the fuel cell 41 is generated as in the present embodiment, the vaporizer 36 The fuel for power generation supplied from the fuel cartridge 21 is heated by the heater 39 and vaporized through the evaporation process. The reformer 37 converts the power generation fuel vaporized by the vaporizer 36 into a mixed gas of hydrogen (H ₂ ) and by-product carbon dioxide (CO ₂ ) through a steam reforming reaction process. Convert. The CO remover 38 converts carbon monoxide gas (CO) contained in the mixed gas converted by the reformer 37 as a small amount of by-products into carbon dioxide gas and removes it. The fuel cell 41 generates the supply power to the load and the operation power of each part of the power generation module 30A by the high concentration hydrogen gas generated in the reformer 37 and the CO remover 38.

  More specifically, the vaporizer 36 has a heater 39 controlled by a driver 40 to approximately boiling point with respect to methanol and water which are power generation fuel supplied from the fuel cartridge 21 via the second pump 34. By setting the atmosphere of the temperature condition, methanol and water are vaporized and led to the reformer 37. Further, in order to prevent the heat generated by the heater 39 from being dissipated to the surroundings to reduce the heating efficiency, the vaporizer 36 and the heater 40 are provided in a heat insulating container having a heat insulating structure such as a vacuum, an inert gas, or air. It may be configured.

The reformer 37 converts the power generation fuel introduced from the fuel cartridge 21 via the vaporizer 36 into hydrogen gas (H ₂ ). Specifically, by setting an atmosphere having a temperature condition of approximately 300 [° C.] with the heater 39 controlled by the driver 40 for the vaporized methanol and water introduced, the following equation (1) As shown in the chemical reaction, it is converted into a mixed gas of hydrogen and carbon dioxide.
CH ₃ OH + H ₂ O → 3H ₂ + CO ₂ (1)

  The reformer 37 is configured by, for example, a microreactor that reforms the introduced mixed gas of methanol and water and discharges the mixed gas of hydrogen and carbon dioxide.

  Further, since the chemical reaction shown in the formula (1) is an endothermic reaction, the reformer 37 is provided with a heater 39 in order to advance this reaction efficiently. Moreover, in order to prevent that the heat by the heater 39 is radiated to the surroundings and the heating efficiency is lowered, the reformer 37 may be covered with a heat insulating container and insulated from the outside air.

The CO remover 38 removes carbon monoxide gas that is toxic to the human body from a small amount of by-products contained in the mixed gas mainly composed of hydrogen and carbon dioxide produced by the reformer 37. By setting an atmosphere of a predetermined temperature condition with the heater 39 controlled by the driver 40, this carbon monoxide gas is converted into hydrogen gas and carbon dioxide gas by a chemical reaction shown in the following formula (2). . Also, a known catalyst such as Pt and Al ₂ O ₃ for efficiently carrying out the chemical reaction shown in the formula (2) is supported inside the CO remover 38.
CO + H ₂ O → H ₂ + CO ₂ (2)

  Since the chemical reaction shown in Formula (2) is an exothermic reaction, it may have a structure that conducts heat generated in the CO remover 38 to the reformer 37. Also, the CO remover 38 may be configured to be covered with a heat insulating container and insulated from the outside air in order to prevent heat from being radiated to the surroundings and reducing the heating efficiency. Further, the CO remover 38 may be provided with a heat dissipating means (not shown) for discharging the reaction heat.

The water (H ₂ O) required for the chemical reaction shown in the formula (2) is filled with the water remaining after the reaction in the reformer 37 out of the water supplied as the power generation fuel from the fuel cartridge 21. However, when the amount of water is not sufficient with respect to the carbon monoxide gas in the mixed gas, a structure for supplying the insufficient amount of water to the CO remover 38 may be added.

Further, the CO remover 38 converts carbon monoxide gas into carbon dioxide gas by a chemical reaction represented by the formula (3). As a result, the carbon monoxide gas that could not be removed by the chemical reaction shown in the formula (2) is removed from the mixed gas, and the concentration of the carbon monoxide gas in the mixed gas does not affect the human body. Can be lowered.
2CO + O ₂ → 2CO ₂ (3)

  Further, in the CO remover 38, only the carbon monoxide gas is selectively expressed by the chemical formula (3) without consuming the hydrogen gas contained in the mixed gas introduced from the reformer 37. A known catalyst for oxidation in the reaction is supported.

The fuel cell 41 is, for example, a solid polymer type fuel cell, and is roughly divided into a fuel electrode (cathode) composed of a carbon electrode to which catalyst fine particles such as platinum and platinum-ruthenium alloy are attached, and a catalyst such as platinum and ruthenium. It has an air electrode (anode) composed of a carbon electrode to which fine particles are attached, and a well-known film-like ion conductive film (exchange membrane) interposed between the fuel electrode and the air electrode. Here, the fuel electrode is supplied with hydrogen gas (H ₂ ) extracted (the concentration is increased) by the reformer 37 and the CO remover 38 described above, while the air electrode is in the atmosphere. By supplying oxygen gas (O ₂ ), an electrochemical reaction proceeds to generate power, and electric energy to be a predetermined driving power source (voltage / current) is supplied to the load.

Specifically, when hydrogen gas is supplied to the fuel electrode, hydrogen ions (protons: H ⁺ ) from which electrons (e ⁻ ) have been separated by the catalyst as shown in the following chemical reaction (4) It is generated and transmitted to the air electrode through the ion conductive film, and electrons (e ⁻ ) are taken out by the carbon electrode constituting the fuel electrode and supplied to the load.
3H ₂ → 6H ⁺ + 6e ⁻ (4)

On the other hand, when air is supplied to the air electrode, as in the chemical reaction shown in the following formula (5), electrons (e ⁻ ) passing through the load by the catalyst and hydrogen ions (H ⁺ ) And oxygen gas in the air react to produce water (3H ₂ O).
6H ⁺ + 3 / 2O ₂ + 6e ⁻ → 3H ₂ O (5)

Such a series of electrochemical reaction formulas (formulas (4) and (5)) generally proceed in a relatively low temperature environment of 60 to 80 [° C.], and by-products other than electric power are basically Only water (H ₂ O) is present.

  Note that the drive power supply (voltage / current) supplied to the load by the electrochemical reaction formula (formulas (4) and (5)) as described above is the amount of hydrogen gas supplied to the fuel electrode of the fuel cell 41. Dependent. Therefore, the electric power generation control unit 31A controls the second pump 34 to control the amount of hydrogen gas supplied to the fuel electrode, thereby arbitrarily setting the electric energy generated by the fuel cell 41 (generated power). Can be adjusted.

  Thus, first, the power generation fuel supplied from the fuel cartridge 21 to the carburetor 36 via the first pump 32, the spare tank 33, and the second pump 34 is vaporized by the carburetor 36, and then modified. It is converted into a mixed gas of hydrogen and carbon dioxide by the mass device 37. Next, carbon monoxide gas contained in this mixed gas in a trace amount as an impurity is converted and removed into carbon dioxide gas by the CO remover 38 and supplied to the fuel cell 41 as high-concentration hydrogen gas.

(Power holding unit)
The control circuit 43 controls the output destination of the power supplied from the fuel cell 41 based on the charge control signal from the power generation control unit 31A, thereby charging the power holding unit 42 or supplying the power to the DC / DC converter 44. Or output. The power holding unit 42 serves as a main power supply in place of the fuel cell 41 when the portable device 10 is activated.

  Specifically, when the portable device 10 is turned on, the power stored in the power holding unit 42 is output to the driver 40 via the DC / DC converter 44. Then, the heater 39 is energized to heat it, and the fuel cell 41 starts to generate power when the power generation fuel is conveyed from the reserve tank 33 to the vaporizer 36 via the second pump 34. Actually, power generation is performed after the startup process described later. After the start of power generation, the power generation control unit 31A switches the power output destination of the control circuit 43 from the power holding unit 42 to the DC / DC converter 44 after fully charging the power holding unit 31. Further, the control of the fuel injection amount of the power generation fuel supplied from the reserve tank 33 via the second pump 34 by the power generation control unit 31A is started after the heater 39 is sufficiently heated for preparation for power generation, for example. Is done.

  For this reason, the control circuit 43 fully charges the power holding unit 42 during the power generation of the fuel cell 41. When the power holding unit 42 is not fully charged when the power is turned off, the portable device 10 stops the fuel cell system 20A after fully charging the power holding unit 42.

[Power generation control unit]
Next, the function of the power generation control unit 31A will be described. The power generation control unit 31A basically implements various control functions under the control of the CPU 11. When the portable device 10 (load) is activated, the power stored in the power holding unit 42 is supplied to the driver 40. In this starting operation, the power generation control unit 31A controls the temperature of the heater 39 by outputting a temperature control signal to the driver 40 based on the temperature detected by a temperature sensor (not shown).

  In parallel with the temperature control of the heater 39, the power generation control unit 31A outputs first and second drive amount signals to be described later to the first pump 32 and the second pump 34, respectively. 32, by controlling the operation (supply operation, stop operation) of the second pump 34, the transfer and shutoff of the fuel for power generation from the fuel cartridge 21 to the vaporizer 36 via the spare tank 33 are controlled. The power generated by the fuel cell 41 is adjusted by controlling the supply amount of the power generation fuel.

  Specifically, when the power generation control unit 31A receives a signal from the CPU 11 to start the load in a state where the vaporizer 36, the reformer 37, the CO remover 38, and the fuel cell 41 are not driven. Starts the fuel supply operation of the first pump 32 and the second pump 34 and the temperature control of the heater 39, and starts the supply of power generation fuel to the carburetor 36, whereby the carburetor 36, the reformer 37, the CO remover 38 and the fuel cell 41 are driven.

  The power generation control unit 31A receives a supply power signal indicating supply power from the DC / DC converter 44 in a state where the vaporizer 36, the reformer 37, the CO remover 38, and the fuel cell 41 are driven. An inclination signal indicating the direction and degree of inclination of the fuel cell system 20A is input from the inclination sensor 45, and the input signals are transmitted to the CPU 11. The power generation control unit 31 </ b> A receives the first and second drive amount signals from the CPU 11 and outputs the signals to the first pump 32 and the second pump 34, and the first pump 32 and the second pump 34. The generated power of the fuel cell 41 is adjusted by controlling the supply operation. The power generation control unit 31A receives a temperature control signal from the CPU 11 in parallel with the supply operation control of the first pump 32, and controls the temperature of the heater 39 based on the temperature control signal. In this way, the power generation control unit 31 </ b> A executes power generation control of the fuel cell 41.

  Then, the power generation control unit 31A receives the charge control signal from the CPU 11 and outputs the charge control signal to the control circuit 43 so that the output destination of the power supplied from the fuel cell 41 is the DC / DC converter 44 or the power holding unit 42. Control whether to charge. Furthermore, the power generation control unit 31A receives a signal indicating the supply power output from the DC / DC converter 44, and outputs a conversion control signal to the DC / DC converter 44 based on the supply power. Based on the conversion control signal, the DC / DC converter 44 converts the generated power from the fuel cell 41 or the total power of the generated power and the discharged power from the power holding unit 42 into direct current adapted to the load.

  For example, when the load drive state signal received from the CPU 11 indicates that the portable device 10 requires a large supply power, the power generation control unit 31A is stored in the power holding unit 42 in addition to the power generated by the fuel cell 41. The conversion control signal is output to the DC / DC converter 44 so that the power that is being output is also output.

  Further, in a state where the vaporizer 36, the reformer 37, the CO remover 38, and the fuel cell 41 are driven, the power generation control unit 31A receives the resistance value signal from the remaining amount sensor 23, and from the resistance value signal The remaining amount of power generation fuel in the main tank 22 is calculated and transmitted to the CPU 11.

  For example, as shown in FIGS. 3A, 3B, and 3C, a fuel cartridge 21 indicated by a one-dot chain line and a spare tank 33 indicated by a dotted line are mounted inside the portable device 10. .

[Fuel supply operation]
Here, with reference to FIGS. 4 to 6, the fuel supply operation for supplying the power generation fuel in the fuel cartridge 21 to the chemical reaction unit 35 in the portable device 10 will be described. FIG. 4 is a flowchart showing the startup supply process. FIG. 5 is a flowchart showing the operation supply process. FIG. 6 is a flowchart showing the control process at the time of running out of fuel. As the fuel supply operation, a start-up supply process for supplying power generation fuel when the mobile device 10 is started, an operation supply process for supplying power generation fuel while the mobile device 10 is operating, and the first pump 32. The out-of-fuel control process for determining the out-of-fuel condition will be described in order.

  First, the startup supply process will be described with reference to FIG. In the start-up supply process, the CPU 11 reads out the start-up supply program stored in the ROM 12 and develops it in the RAM 13 when the power of the portable device 10 is turned on. The startup supply process is realized by the CPU 11 executing the startup supply program expanded in the RAM 13. The stored power of the power holding unit 42 is used as a power source at the time of startup in the load.

  Here, the remaining amount of power generation fuel in the main tank 22 is defined as a main tank remaining amount T1R. The main tank remaining amount T1R can be measured by the remaining amount sensor 23. The inclination information of the mobile device 10 is S. The inclination information S is output from the inclination sensor 45. Further, the remaining amount of power generation fuel in the reserve tank 33 is set as a reserve tank remaining amount T2R. The reserve tank remaining amount T2R cannot be directly measured but is obtained by calculation. Further, it is assumed that the main tank remaining amount T1R and the spare tank remaining amount T2R are stored in the FROM 14.

  In addition, the transport amount of the power generation fuel per unit time of the first pump 32 is defined as a first transport amount T1 (T1R, S). For example, the experimental value of the first transport amount T1 is stored in the FROM 14 in the form of a table in association with the values of the main tank remaining amount T1R and the inclination information S. Therefore, when the main tank remaining amount T1R and the inclination information S are determined, the first transport amount T1 is determined by referring to the table. Further, the driving amount of the first pump 32 is set as a first driving amount P1D. The first drive amount P1D is, for example, the drive time of the first pump 32.

  As shown in FIG. 4, first, whether or not the remaining amount of the main tank can be measured by the remaining amount sensor 23, that is, the inclination angle of the portable device 10 can measure the remaining amount of the main tank by the remaining amount sensor 23. Whether it is within the range is determined (step S11). When the main tank remaining amount can be measured (step S11; YES), the main tank remaining amount T1R is measured by the remaining amount sensor 23, and the main tank remaining amount T1R is acquired from the remaining amount sensor 23 via the power generation control unit 31A. (Step S12). Then, the reserve tank remaining amount T2R stored in the FROM 14 is read (step S13).

  If the main tank remaining amount cannot be measured (step S11; YES), the main tank remaining amount T1R stored in the FROM 14 is read (step S14), and the process proceeds to step S13. After step S13, the inclination information is detected by the inclination sensor 45, and the inclination information S is acquired from the inclination sensor 45 via the power generation control unit 31A (step S15).

Then, using the main tank remaining amount T1R, the spare tank remaining amount T2R, and the inclination information S acquired in steps S12, 13, 14, and 15, the first drive amount P1D is calculated by the following equation (6). (Step S16).
P1D = K1 * (F2-T2R) / T1 (T1R, S) (6)
However, F2 is the total capacity of the reserve tank 33. K1 is a coefficient used for calculation. The coefficient K1 is stored in the FROM 14 and is read out when used. Further, the first drive amount P1D is calculated so as to fill the reserve tank 33 (the remaining amount is 100%).

  Then, based on the first drive amount P1D calculated in step S16, the power generation fuel in the main tank 22 is conveyed to the spare tank 33 by the first pump 32 (step S17). Then, the reserve tank remaining amount T2R stored in the FROM 14 is updated to full (100%) (step S18), and the start-up supply process is terminated. In step S18, the main tank remaining amount T1R after the fuel transfer may also be measured by the remaining amount sensor 23 and stored (updated) in the FROM 14.

  Next, the operation supply process will be described with reference to FIG. The operation supply process is a process that is periodically executed at predetermined time intervals while the mobile device 10 is in operation. In the operation supply process, the CPU 11 reads the operation supply program stored in the ROM 12 and develops it in the RAM 13, triggered by a new time or the elapse of a predetermined time after the previous operation supply process. Then, the CPU 11 executes the operation supply program developed in the RAM 13 to realize the operation supply process.

  Here, the transport amount per unit time of the second pump 34 is defined as a second transport amount T2 (T2R, S). For example, the experimental value of the second transport amount T2 is stored in the FROM 14 in the form of a table in association with the values of the reserve tank remaining amount T2R and the inclination information S. Therefore, if the reserve tank remaining amount T2R and the inclination information S are determined, the second transport amount T2 is determined by referring to the table. Further, the driving amount of the second pump 34 is set to a second driving amount P2D. The second drive amount P2D is, for example, the drive time of the second pump 34.

  As shown in FIG. 5, first, the reserve tank remaining amount T2R is read from the FROM 14, the inclination information is detected by the inclination sensor 45, and the inclination information S is acquired from the inclination sensor 45 via the power generation control unit 31A ( Step S21). Then, the second drive amount P2D corresponding to the reserve tank remaining amount T2R and the inclination information S acquired in step S21 and the electric power necessary for the portable device 10 (load) is calculated (step S22).

  Then, based on the second drive amount P2D calculated in step S22, the power generation fuel in the reserve tank 33 is conveyed to the chemical reaction unit 35 by the second pump 34 (step S23).

Then, the reserve tank remaining amount T2R (T2R (New)) after transport in step S23 is calculated using the following equation (7), and is set as the reserve tank remaining amount T2R (T2R (Old)) stored in the FROM 14. ) Is updated to the calculated reserve tank remaining amount T2R (New) (step S24). The reserve tank remaining amount T2R (New) is
T2R (New) = T2R (Old) −K2 * T2 (T2R, S) * P2D (7)
It is calculated by the following formula. However, K2 is a coefficient for calculation. The coefficient K2 is stored in the FROM 14 so as to be rewritable. When calculating the equation (7), the coefficient K2 is read from the FROM 14 and calculated.

  Then, it is determined whether or not the reserve tank remaining amount T2R updated in step S24 is, for example, 50% or less with respect to the total capacity F2 of the reserve tank 33 (step S25). If it is not 50% or less (step S25; NO), similarly, whether or not the spare tank remaining amount T2R updated in step S24 is, for example, 90% or less with respect to the total capacity F2 of the spare tank 33. Is determined (step S26). If it is not less than 90% (step S26; NO), the operation supply process is terminated.

  When it is 90% or less (step S26; YES), the main tank remaining amount T1R is read from the FROM 14, the inclination information is detected from the inclination sensor 45, and the inclination information S is detected from the inclination sensor 45 via the power generation control unit 31A. Obtained (step S27). Then, using the main tank remaining amount T1R and the inclination information S acquired in step S27 and the spare tank remaining amount T2R updated in step S24, an expression is established so that the remaining amount T2R of the spare tank is 90% or more. The first drive amount P1D is calculated by (1) (step S28). Specifically, after calculating the first transfer amount T1 from the main tank remaining amount T1R and the inclination information S, the first transfer amount T1 and the reserve tank remaining amount T2R are used to calculate the first transfer amount T1 by the formula (1). A driving amount P1D of 1 is calculated.

  Then, based on the first drive amount P1D calculated in step S28, the power generation fuel in the main tank 22 is conveyed to the spare tank 33 by the first pump 32 (step S29). Then, the main tank remaining amount T1R stored in the FROM 14 is updated to the main tank remaining amount T1R acquired in Step S27, and the spare tank remaining amount T2R stored in the FROM 14 is updated after the power generation fuel is transferred in Step S29. The spare tank remaining amount T2R is updated (step S30), and the operation supply process is terminated. For example, in steps S27 to S29, the spare tank remaining amount T2R may be executed to be 100%.

  If it is 50% or less (step S25; YES), a state in which the remaining amount in the spare tank 33 is abnormally small has occurred, so the degree of inclination including the change in the orientation of the portable device 10 is large, and the spare tank 33 Therefore, it is determined that the power generation fuel cannot be supplied to the chemical reaction unit 35. Therefore, a message “prompt to correct the orientation and tilt of the mobile device 10” is displayed on the LCD 15 (step S31), and the operation supply process is terminated. The user can confirm the message visually to correct the inclination (posture) of the mobile device 10. Note that the above steps S24, S25, and S26 constitute spare tank remaining amount detecting means in the present invention.

  Next, with reference to FIG. 6, the control process at the time of fuel shortage will be described. The control process at the time of running out of fuel is a process periodically executed at predetermined time intervals while the mobile device 10 is in operation. In the fuel shortage control process, the CPU 11 reads out the fuel shortage control program stored in the ROM 12 and develops it in the RAM 13, triggered by a new time or the elapse of a predetermined time after execution of the previous fuel shortage control process. Then, the CPU 11 executes the fuel shortage control program developed in the RAM 13 to realize the fuel shortage control process.

  As shown in FIG. 6, first, the main tank remaining amount T1R and the spare tank remaining amount T2R stored in the FROM 14 are read (step S41). The main tank remaining amount T1R may be configured such that the main tank remaining amount T1R is acquired from the remaining amount sensor 23. Then, it is determined whether or not the main tank remaining amount T1R acquired in step S41 is “0”, that is, whether or not the main tank 22 is empty (step S42). If the main tank 22 is not empty (step S42; NO), the control process at the time of fuel exhaustion is terminated.

  When the main tank 22 is empty (step S42; YES), a message “prompt to replace the fuel cartridge 21 due to occurrence of fuel for power generation” is displayed on the LCD 15 (step S43). The user can visually confirm the message and replace the empty fuel cartridge 21 with a fuel cartridge 21 containing fuel for power generation.

  Then, the main tank remaining amount T1R stored in the FROM 14 is updated (reset) to “0” (step S44). Then, it is determined whether or not the reserve tank remaining amount T2R acquired in step S41 is “0”, that is, whether or not the reserve tank 33 is empty (step S45). When the reserve tank 33 is not empty (step S45; NO), it is determined whether or not the power generation operation in the fuel cell system 20A is normal (step S46). Step S46 is determined based on, for example, whether or not the temperature of the chemical reaction unit 35 is abnormally high or the temperature is low. When the power generation operation is normal (step S46; YES), the power generation amount of the fuel cell 41 is acquired from the control circuit 43 via the power generation control unit 31A, and it is determined whether or not the power generation amount is reduced ( Step S47).

  If the power generation amount has not decreased (step S47; NO), the control process at the time of fuel exhaustion is terminated. This is because, even if the power generation fuel in the main tank 22 runs out, the power generation in the reserve tank 33 is normal and the power generation amount is not reduced. In this case, the user replaces the fuel cartridge 21 that has run out of fuel with a fuel cartridge 21 that contains fuel for power generation before the fuel for power generation in the reserve tank 33 runs out. Can be used.

On the other hand, when the power generation amount has decreased (step S47; YES), the remaining amount of power generation fuel in the reserve tank 33 is not actually "0" in the calculation according to the equation (7), but actually It is determined that the value is “0”, and it is determined that the coefficient K2 in Expression (7) is not appropriate. Therefore, a new correction coefficient K2 (New) is calculated by the following equation (8), and the coefficient K2 (Old) stored in the FROM 14 is updated to the coefficient K2 (New) (step S48). The coefficient K2 (New) is
K2 (New) = K2 (Old) * F2 / (F2-T2R) (8)
It is calculated by the following formula.

  Then, the reserve tank remaining amount T2R is regarded as “0”, and the reserve tank remaining amount T2R stored in the FROM 14 is updated (reset) to “0” (step S49). When the reserve tank 33 is empty (step S42; YES), the process proceeds to step S49. Then, the power generation operation in the fuel cell system 20A is stopped (step S50), and the control process at the time of fuel exhaustion is ended. When the power generation operation is not normal (step S46; NO), the process proceeds to step S50.

  As described above, according to the present embodiment, in the small fuel cell system 20A used for the portable device 10, the spare tank 33 is provided, and the fuel cartridge 21 is set so that the spare tank remaining amount is 90% or more (substantially full). Is supplied with power generation fuel, and the second pump 34 is driven and controlled in accordance with the amount of power generation fuel required for power generation. Therefore, regardless of the inclination of the fuel cartridge 21, it is possible to stably supply the power generation fuel to the chemical reaction unit 35 and generate power with the fuel cell 41.

  Further, the first transport amount T1 and the second transport amount T2 can be accurately calculated using the tilt information of the tilt sensor 45, and the first pump 32 and the second pump 34 can be driven and controlled. Further, since the impregnating material is disposed in the reserve tank 33, even when the inclination of the fuel cartridge 21 is large, the power generation fuel can be stably conveyed to the chemical reaction unit 35 by the second pump 34. .

  Further, since the first pump is driven when the remaining amount of the reserved tank in the reserved tank 33 is less than 90%, it is possible to prevent the power generation fuel from being excessively conveyed to the reserved tank 33. Further, since the first transport amount T1 is calculated based on the main tank capacity T1R detected by the remaining amount sensor 23, a predetermined amount of fuel for power generation is accurately reserved based on the first transport amount T1. It can be conveyed to the tank 33. In addition, the coefficient K2 is corrected when the main tank 22 is empty, the remaining amount in the reserve tank is present, the power generation operation is normal, and an abnormality in which a decrease in generated power is detected. Then, after the next startup, the second pump is driven and controlled using the corrected coefficient K2. Therefore, after the next start-up, the fuel cell 41 can generate power more stably by supplying the power generation fuel to the chemical reaction unit 35 regardless of the inclination of the fuel cartridge 21.

(Second Embodiment)
The second embodiment will be described with reference to FIG. FIG. 7 is a diagram showing an internal configuration of the fuel cell system 20B mounted on the portable device 10 of the present embodiment. This embodiment has a configuration similar to that of the first embodiment. In order to prevent duplication of explanation, portions different from the first embodiment will be mainly described. The mobile device 10 of the present embodiment has a fuel cell system 20B instead of the fuel cell system 20A of the first embodiment.

  The fuel cell system 20B includes a fuel cartridge 21 and a power generation module 30B. The power generation module 30B includes, in addition to the components of the power generation module 30A, a free flow path 46 that flows into the main tank 22 the power generation fuel overflowing from the reserve tank 33, and the free flow path 46 from the main tank 22 to the reserve tank 33. And a backflow prevention valve 47 as a backflow prevention unit for preventing backflow of the fuel for power generation.

  In the first embodiment, in the control of the first pump 32, the first drive amount P1D is calculated using the main tank remaining amount T1R, the spare tank remaining amount T2R, and the like. Since the first driving amount P1D is an expected value, there is a possibility that the power generation fuel may overflow from the reserve tank 33 if the calculated result is larger than the actually required value.

  In this embodiment, by providing the free flow path 46 and the backflow prevention valve 47, even if more power generation fuel is transported to the reserve tank 33, the overflowing amount is passed through the free flow path 46. Returned to the main tank 22. When the fuel for power generation overflows from the reserve tank 33, the backflow prevention valve 47 is opened. For this reason, it is not necessary to monitor the reserve tank remaining amount T2R, and it is not necessary to calculate the first drive amount P1D based on the reserve tank remaining amount T2R. In the first pump 32, for example, the fuel for power generation can be conveyed at a predetermined timing continuously, periodically, or intermittently with a constant first driving amount P1D. For this reason, the reserve tank 33 always stores substantially full power generation fuel.

For example, during the period from the previous transfer of power generation fuel from the main tank 22 until the next time the transfer of power generation fuel from the main tank 22 becomes possible,
(Driving amount of the second pump) * (Maximum conveying amount of the second pump) <(Driving amount of the first pump) * (Minimum conveying amount of the first pump)
Thus, it is only necessary to drive the first pump 32.

  Further, the backflow prevention valve 47 can also prevent the power generation fuel from flowing from the main tank 22 to the reserve tank 33 via the free flow path 46 and overflowing from the reserve tank 33. The drive control of the second pump 34 is performed so that the power generation fuel required for power generation is conveyed to the chemical reaction unit 35, as in the first embodiment.

  As described above, according to the present embodiment, in the small fuel cell system 20B used for the portable device 10, the first pump 32 is installed at a predetermined timing so as to store substantially full power generation fuel in the reserve tank 33. The second pump 34 is driven and controlled according to the amount of fuel for power generation required for power generation while being driven in a fixed amount. Therefore, regardless of the inclination of the main tank 22, the fuel for power generation can be stably supplied to the chemical reaction unit 35 and can be generated by the fuel cell 41, and the fuel for power generation is excessively transported to the reserve tank 33. Even so, overflow of the reserve tank 33 can be prevented by the free flow path 46 and the control of the first pump 32 can be facilitated. Further, by providing the backflow prevention valve 47, it is possible to prevent fuel supply abnormality caused by the inflow of power generation fuel directly from the main tank 22 to the reserve tank 33.

In addition, the detailed part demonstrated in the said embodiment is not limited to the said content, It can change suitably.
In the first embodiment, various processes related to fuel supply (start-up supply process, operation supply process, and fuel-out control process) are performed in cooperation with the CPU 11, ROM 12, RAM 13, and FROM 14. This is not a limitation. For example, the power generation control unit 31A may be provided with ROM, RAM, and FROM, and the power generation control unit 31A may be a main body of various processes.

  Moreover, the structure which combines 1st Embodiment and 2nd Embodiment may be sufficient. For example, the power generation module 30A is provided with a free flow path 46 and a backflow prevention valve 47. Further, a combustion catalyst device that generates heat by a combustion reaction of hydrogen, methanol or the like may be provided in place of the heater 39. Furthermore, the structure which adjoins the combustion catalyst device and the heater 39 may be sufficient.

It is a figure which shows an example of an internal structure of the portable apparatus 10 of 1st Embodiment which concerns on this invention. It is a figure which shows the internal structure of 20 A of fuel cell systems mounted in the portable apparatus 10 of 1st Embodiment. FIG. 2 is an external view of the mobile device 10, (a) is a front view of the mobile device 10, (b) is a top view of the mobile device 10, and (c) is a right side view of the mobile device 10. It is a flowchart which shows a supply process at the time of starting. It is a flowchart which shows an operation time supply process. It is a flowchart which shows a control process at the time of fuel exhaustion. It is a figure which shows the internal structure of the fuel cell system 20B mounted in the portable apparatus 10 of 2nd Embodiment which concerns on this invention.

Explanation of symbols

10 Mobile device 11 CPU
12 ROM
13 RAM
14 FROM
15 LCD
16 LCD driver 17 Touch panel 18 Communication I / F
19 Buses 20A and 20B Fuel cell system 21 Fuel cartridge 22 Main tank 23 Remaining amount sensors 30A and 30B Power generation modules 31A and 31B Power generation control unit 32 First pump 33 Spare tank 34 Second pump 35 Chemical reaction unit 36 Vaporizer 37 Reformer 38 CO remover 39 Heater 40 Driver 41 Fuel cell 42 Power holding unit 43 Control circuit 44 DC / DC converter 45 Inclination sensor 46 Free flow path 47 Backflow prevention valve

Claims (14)

In a power supply system equipped with power generation means for generating power using power generation fuel,
A main tank for storing the fuel for power generation;
A reserve tank for supplying the power generation fuel from the main tank, storing the supplied power generation fuel, and supplying the power generation means to the power generation means;
First conveying means for conveying the fuel for power generation in the main tank to the spare tank;
Spare tank remaining amount detecting means for detecting the remaining amount of power generation fuel in the spare tank;
Control means for controlling the first conveying means so as to store a predetermined amount of the fuel for power generation in the spare tank in accordance with the detection result of the spare tank remaining amount detecting means;
With
The power supply system according to claim 1, wherein the reserve tank includes a holding unit that holds at least the power generation fuel supplied from the main tank in the vicinity of a fuel outlet.   2. The power supply system according to claim 1, wherein the control unit controls the first transfer unit so that the spare tank is almost full. The power supply system includes second transfer means for transferring the power generation fuel in the reserve tank to the power generation means,
3. The power supply system according to claim 1, wherein the control unit controls the second transfer unit in accordance with a necessary amount of the fuel for power generation required for power generation by the power generation unit.   4. The power supply system according to claim 3, wherein at least one of the first transport unit and the second transport unit includes a pump whose transport amount is controlled by a predetermined drive signal. 5. Power system. The power supply system predicts a remaining amount of power generation fuel in the reserve tank by performing a predetermined prediction calculation process using at least a control amount of the second transport unit and a predetermined calculation coefficient by the control unit. When,
A power decrease detection means for detecting a decrease in power generated by the power generation means;
When the prediction means predicts that there is a remaining amount in the reserve tank and the power drop detection means detects a decrease in generated power, a correction means for correcting the value of the calculation coefficient;
The power supply system according to claim 3 or 4, further comprising: The control means further includes an inclination angle detecting means for detecting an inclination angle of the main tank and the reserve tank,
The said 1st conveyance means and / or the said 2nd conveyance means are controlled in consideration of the inclination angle detected by the said inclination-angle detection means, The any one of Claim 1 to 4 characterized by the above-mentioned. Power system. The reserve tank remaining amount detecting means detects whether or not the remaining amount of the power generating fuel in the reserve tank is a reference amount or more,
The control means controls the first conveying means so that the remaining amount in the spare tank is equal to or greater than the reference amount when the remaining amount is detected to be less than the reference amount by the spare tank remaining amount detecting means. It controls, The power supply system as described in any one of Claim 1 to 6 characterized by the above-mentioned. The power system includes a main tank remaining amount detecting means for detecting a remaining amount of power generation fuel in the main tank,
The power supply system according to any one of claims 1 to 7, wherein the control unit controls the first transport unit based on a detection result of the main tank remaining amount detection unit. In a portable device provided with a power supply system having power generation means for generating power using fuel for power generation, driven by the power generated by the power generation means,
The power supply system includes:
A main tank for storing the fuel for power generation;
A reserve tank for supplying the power generation fuel from the main tank, storing the supplied power generation fuel, and supplying the power generation means to the power generation means;
First conveying means for conveying the fuel for power generation in the main tank to the spare tank;
Spare tank remaining amount detecting means for detecting the remaining amount of power generation fuel in the spare tank;
Control means for controlling the first conveying means so as to store a predetermined amount of the fuel for power generation in the spare tank in accordance with the detection result of the spare tank remaining amount detecting means;
With
The portable tank according to claim 1, wherein the reserve tank includes a holding unit that holds at least the fuel for power generation supplied from the main tank in the vicinity of a fuel outlet.   The portable device according to claim 9, wherein the control unit controls the first transport unit so that the spare tank is substantially full. The power supply system includes second transfer means for transferring the power generation fuel in the reserve tank to the power generation means,
11. The portable device according to claim 9, wherein the control unit controls the second transport unit according to a necessary amount of the fuel for power generation required for power generation by the power generation unit. The control means further includes an inclination angle detecting means for detecting an inclination angle of the main tank and the reserve tank,
12. The first transport unit and / or the second transport unit are controlled in consideration of the tilt angle information detected by the tilt angle detection unit. The portable device as described in. The reserve tank remaining amount detecting means detects whether or not the remaining amount of the power generating fuel in the reserve tank is a reference amount or more,
The control means controls the first conveying means so that the remaining amount in the spare tank is equal to or greater than the reference amount when the remaining amount is detected to be less than the reference amount by the spare tank remaining amount detecting means. The mobile device according to claim 9, wherein the mobile device is controlled. The power system includes a main tank remaining amount detecting means for detecting a remaining amount of power generation fuel in the main tank,
The portable device according to any one of claims 9 to 13, wherein the control unit controls the first transfer unit based on a detection result of the main tank remaining amount detection unit.

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